Bankroll Calculator

Bankroll Calculator

Plan your gambling session before you start. See how long your bankroll will last, what your expected loss is, and what your risk level looks like — all based on real maths.

Session Parameters

$
$
%

How to Use This Calculator

1

Enter Your Bankroll

This is the total amount you plan to play with for this session. Only use money you can afford to lose.

2

Set Your Bet Size

The amount per spin or hand. We recommend 1-2% of your bankroll for sustainable play.

3

Enter the Game RTP

Find this in the game info or use our RTP Lookup Tool. Most slots are 94-97%.

4

Review Your Results

The calculator shows your expected loss, session length, and simulated bankroll paths. Use this to adjust your settings before playing.

Expert Tip

If the risk level shows red (>70%), reduce your bet size or increase your bankroll. A green risk level means your stake-to-bankroll ratio is sustainable for the number of spins you plan to play.

— Sarah Chen, Strategy Specialist

Important Disclaimer

This calculator provides mathematical estimates based on theoretical RTP. Actual results will vary due to volatility. Gambling always carries risk of loss. Never gamble more than you can afford to lose.

Frequently Asked Questions

It calculates expected loss using the formula: Expected Loss = Spins x Stake x House Edge (where House Edge = 100% - RTP). It also runs Monte Carlo simulations to show possible real outcomes alongside the mathematical expectation.
A general rule is 1-2% of your session bankroll per bet. For a $100 bankroll, that means $1-$2 per spin. This ensures you have enough spins to experience the game and ride out variance.
Risk of ruin is the approximate probability of losing your entire bankroll during the session. It's based on the ratio of expected loss to bankroll size. Lower is better — aim for under 40%.
The expected value calculation is mathematically accurate. However, actual sessions vary due to volatility. The simulation lines demonstrate this variance. Think of it as a planning tool, not a prediction.
Use the RTP published by the game provider — usually found in the game's info/help section. Most slots range from 94-97%. Use our RTP Lookup Tool to find specific game RTPs.

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